Doing a small burn out is good regardless, just to at least clean the tire off. Also depending on pressure it is good to lower pressure even on street radials. Lots of us have done a lot of testing with Invos, which are recommended to be at 35+psi but at the track we all do much better with 20-22 in them

Most modern tires recommend 35-45psi for fuel economy and there is NO WAY you're going to be able to hook up on a rock hard 40-series tire with ~400hp and a stick. There is a difference between "take some air out" and "take it down to the air pressure you run in a slick." Most of these guys would get a better launch at ~25psi than they will at 40.

*edit, treed by junkie

I agree a quick spin of the tires is good to knock the rocks off or any accidental moisture the tires may have picked up going around the waterbox. I usually just do a quick spin.

While my times are embarrassing, I can't believe how consistent I/my car was...especially running on street tires with a stickshift. .005 difference between my two passes? that's insane.

113 mph...I should be in the low 12s/high 11's. Oh well. I'll leave the ET on the track and save my tranny. Though I have my answer to my other thread. Screw a blower, I am going to start looking at a magnum swap. What good is 200 extra hp if I run 12's at 125 +mph? That's just foolish.

One thing is for sure. The AUTO is the way to go fast in these cars.

The idea is to remove the air pressure enough to make as much of the tire as possible contact the pavement. The compound of the tire with how soft/hard it is will create the traction with heat from the burnout. I'm with you there on all of that.

A tire like an Invo that is a real performance tire being a softer compound will benefit from a good burnout. Also, being an aftermarket tire is most likely a larger tire as well. I can definitely see what you are saying applying to that.

I just don't see it applying as well to someone on a stock 235 Pirelli that is a harder compound designed for all seasons and the side wall is not meant to give at all.

I also agree with you that some people let out way too much air on a street radial thinking they are getting the same effect as they would on a slick. The same could be said for a overly inflated tire.

The auto are definitely much easier to make faster. I agree they are way to go if someone is planning on tracking the car often. But my car is mainly a street car and I still prefer to row gears on the street. Gives more of the drivers experience feeling connected to the car.

:buttkick:

Everything is good. Trying to keep stuff offline. Thanks for understanding

Nic, what was your best mph saturday night?

This.


Taking air out of a street tire is not to make the compound work better, but to let the tire have more give.

All I know is, every time i've gone to the track on street tires, i get better 60 foots with the tires around 24-25 psi compared to 35psi

118

It was good meeting a few more of you guys. Hopefully next time we all hit the track I'll have the converter in. I can't complain about the track though, with those DR's and 3.15 gears I was surprised the car had enough power to even do the burnout!

That's some good mph for a lil 302 with bolt ons.

agreed! That mph is badass for a bolt on car. Perhaps longtubes/boss intake make a bigger difference than I gave them credit for.

I know for a fact the longtubes work on these cars. Nic and I raced before his longtubes and we were close. After his longtubes there was an obvious MPH difference because he had a nice steady pull on me from a roll.

We had a boss out there running 10.50's at 133 mph using the stock 6 speed.. Car has a d-1, fuel system to support, headers, and some control arms. Other wise bone stock suspension with full interior and nothing taken out.

It would have run better times with an auto.